# Copyright (C) 2020 Daniel Richardson richardson.daniel@hotmail.co.uk
#
# This file is part of stockTicker project for justinodunn.
#
# stockTicker can not be copied and/or distributed without the express
# permission of Daniel Richardson


import sys, select
import os
import threading
from PIL import Image, ImageDraw, ImageFont
import time
import csv
import requests

from rgbmatrix import RGBMatrix, RGBMatrixOptions
import finnhub

def getInput(Block=False):
    if Block or select.select([sys.stdin], [], [], 0) == ([sys.stdin], [], []):
        msg = sys.stdin.read(1)
        #sys.stdin.flush()
    else:
        msg = ''
    return msg

  
  
class StockTicker():
    def __init__(self):
        #Define global resources
        self.symbols = []
        self.ApiKey = "c24qddqad3ickpckgg80"
        self.SandboxApiKey = "sandbox_c24qddqad3ickpckgg8g"
        self.greenORred = (255, 255, 255)
        #self.blank = Image.open('logos/blank.png')
        self.blank = Image.new('RGB', (0, 32))
        self.running = True
        self.brightness = 1.0
        self.delay = 0.02

        # Configuration for the matrix
        options = RGBMatrixOptions()
        options.rows = 64
        options.cols = 64
        options.chain_length = 1
        options.parallel = 1
        options.hardware_mapping = 'adafruit-hat' # If you have an Adafruit HAT: 'adafruit-hat'
        options.gpio_slowdown = 3
        self.matrix = RGBMatrix(options = options)
        self.finnhubClient = finnhub.Client(api_key=self.ApiKey)

    def openImage(self, image_file):
        image = Image.open(image_file)
         # Make image fit our screen.
        #image.thumbnail((self.matrix.width, self.matrix.height), Image.ANTIALIAS)

        image = image.convert('RGB')
        return image
        
        
    def setImage(self, image, offset_x = 0, offset_y = 0, unsafe=False):
        
        
        if (image.mode != "RGB"):
            raise Exception("Currently, only RGB mode is supported for SetImage(). Please create images with mode 'RGB' or convert first with image = image.convert('RGB'). Pull requests to support more modes natively are also welcome :)")

        if unsafe:
            #In unsafe mode we directly acceshow to send commands to running python processs the underlying PIL image array
            #in cython, which is considered unsafe pointer accecss,
            #however it's super fast and seems to work fine
            #https://groups.google.com/forum/#!topic/cython-users/Dc1ft5W6KM4
            img_width, img_height = image.size
            
            print('args', img_width, img_height, offset_x, offset_y, image)
            self.matrix.SetPixelsPillow(offset_x, offset_y, img_width, img_height, image)
        else:
            # First implementation of a SetImage(). OPTIMIZE_ME: A more native
            # implementation that directly reads the buffer and calls the underlying
            # C functions can certainly be faster.
            img_width, img_height = image.size
            pixels = image.load()
            for x in range(max(0, -offset_x), min(img_width, self.matrix.width - offset_x)):
                for y in range(max(0, -offset_y), min(img_height, self.matrix.height - offset_y)):
                    (r, g, b) = pixels[x, y]
     
                    self.matrix.SetPixel(x + offset_x, y + offset_y, r*self.brightness, g*self.brightness, b*self.brightness)

    def scrollImage(self, image_file, offset_x = 0, offset_y = 0):
        image = self.openImage(image_file)
        img_width, img_height = image.size
        
        print(offset_x, offset_y)

        while offset_x > -img_width:
            offset_x -= 1
            
            self.setImage(image, offset_x = offset_x, offset_y = offset_y)
            time.sleep(delay)
            
    def scrollImageTransition(self, image_files, offset_x = 0, offset_y = 0):
        # use two image files and switch between them with a seemless transition
        current_img = 1
        
   
        #while True:
            
        if current_img == 1:
            image = self.openImage(image_files[0])
        elif current_img == 2:
            image = self.openImage(image_files[1])
            
        img_width, img_height = image.size

        while offset_x > -img_width:
            
            
            offset_x -= 1
            
            self.setImage(image, offset_x = offset_x, offset_y = offset_y)
            time.sleep(self.delay)
            
            
            try:
                msg = getInput()
                if msg == 'K':
                    self.resetMatrix()
                    break
                
                elif msg == 's':
                    stock_ticker.delay = 0.04
                elif msg == 'm':
                    stock_ticker.delay = 0.02
                elif msg == 'f':
                    stock_ticker.delay = 0.01
                elif msg in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']:
                    self.brightness = min(1.0, float(msg)/10 + 0.1)
                
    
            except KeyboardInterrupt:
                sys.stdout.flush()
                pass
            
                
        if current_img == 1:
            current_img = 2 
        elif current_img == 2:
            current_img = 1 
        offset_x = 0
    
    #Get the logo from file that is the same as ticker name
    def getLogo(self, Ticker):
        try:
            Logo = Image.open('logos/' + Ticker + '.png')
        except:
            print('Could not find logo for: ' + Ticker + ' using default')
            Logo = Image.open('logos/default.png')
        return Logo

    #Using change between min and day price give appropriate arrow
    #and set the overall change colour
    def getArrow(self, CHANGE):
        self.greenORred
        if(CHANGE>0):
            Arrow = Image.open('logos/up.png')
            self.greenORred = (0, 255, 0)
            return Arrow, CHANGE
        Arrow = Image.open('logos/down.png')
        self.greenORred = (255, 0, 0)
        CHANGE = (CHANGE * -1)
        return Arrow, CHANGE

    def get_text_dimensions(self, text_string, font):
        canvas = Image.new('RGB', (100,100))

        draw = ImageDraw.Draw(canvas)
        monospace = font

        text = text_string
        white = (255,255,255)
        draw.text((10, 10), text, font=monospace, fill=white)

        bbox = canvas.getbbox()
        width = bbox[2]-bbox[0]
        height = bbox[3]-bbox[1]

        return width,height

    #Draw Ticker, current and change onto one image
    def textToImage(self, TICKER, CURRENT, CHANGE, ARROW):
        font = ImageFont.load("./fonts/10x20.pil")
        img = Image.new('RGB', (150, 32))
        d = ImageDraw.Draw(img)

        d.text((4, 0), TICKER, fill=(255, 255, 255), font=font)
        d.text((4, 16), CURRENT, fill=self.greenORred, font=font)

        text_width_current, text_height = self.get_text_dimensions(CURRENT, font)

        img.paste(ARROW, ((text_width_current + 9),18))
        d.text(((text_width_current+29), 16), CHANGE, fill=self.greenORred, font=font)

        text_width_change, text_height = self.get_text_dimensions(CHANGE, font)

        newWidth = (text_width_current+29) + (text_width_change)

        img.crop((0,0,newWidth,32)) 
        return img 

    #Stitch the logo & prices picture into one image
    def stitchImage(self, image_list):
        widths, heights = zip(*(i.size for i in image_list))
        total_width = sum(widths)
        max_height = max(heights)
        new_im = Image.new('RGB', (total_width, max_height))
        x_offset = 0
        for im in image_list:
            new_im.paste(im, (x_offset,0))
            x_offset += im.size[0]
            print('width:', im.size[0])
        return new_im

    
    #Get current prices and day prices for the ticker then format the response into an array
    def getStockPrices(self, symbols):
        apiCalledError = False
        stock_info = []
        try:
            quotes = [self.finnhubClient.quote(symbol) for symbol in symbols]
            current_prices = [quote['c'] for quote in quotes]
            opening_prices = [quote['o'] for quote in quotes]
            
            for i, symbol in enumerate(symbols):
                stock_info.append([symbol, current_prices[i], opening_prices[i]])
                
            
        except Exception as e:
            print("Could not fetch data - API CALLS REACHED? - Will display old image")
            print(e)
            apiCalledError = True
        return stock_info, apiCalledError
        
    def resetMatrix(self):
        for x in range(self.matrix.width):
            for y in range(self.matrix.height):
                
     
                self.matrix.SetPixel(x , y , 0,0,0)
            
    #Connect all the pieces togeather creating 1 long final stock image
    def getFullStockImage(self):

        image_list = []
        
        start = time.time()
        stock_info, apiCalledError = self.getStockPrices(self.symbols)
 
        if (apiCalledError == False):
            for i in range(len(stock_info)):
                change = float(stock_info[i][1])-float(stock_info[i][2]) #TEXT
                ticker = stock_info[i][0] #TEXT
                current = '%.2f' % float(stock_info[i][1]) #TEXT

                logo = self.getLogo(stock_info[i][0])
                arrow, change = self.getArrow(change)
                change = '%.2f' % change
                midFrame = self.textToImage(ticker, current, change, arrow) #IMAGE THE TEXT

                stitchedStock = self.stitchImage([logo,midFrame])
                image_list.append(self.blank)
                image_list.append(stitchedStock)
                

        print('elapsed time loop ended: ' + str((time.time()-start)))
        if (apiCalledError == False):
            finalDisplayImage = self.stitchImage(image_list)
            finalDisplayImage.save('final.ppm')
       
     
    #Send the final stitched image to the display for set amount of time
    def displayMatrix(self):
        #os.system("sudo ./demo -D1 final.ppm -t " + str(displayTime) +" -m "+ str(speedDisplay) +" --led-gpio-mapping=adafruit-hat --led-rows=32 --led-cols=256")
        #os.system("sudo ./demo -D1 final.ppm -t " + str(self.displayTime) +" -m "+ str(self.speedDisplay) +" --led-gpio-mapping=adafruit-hat --led-rows=64 --led-cols=64 --led-slowdown-gpio=4 ")
        self.scrollImageTransition(['final.ppm', 'final.ppm'], offset_x = 0, offset_y = 0)
    #Retrieve symbols from the CSV file
    def getSymbols(self):
        
        self.symbols = []
        CSV = csv.reader(open('csv/tickers.csv', 'r'))
        
        for row in CSV:
            print(row)
            self.symbols.append(row[0])
            
   
        print(self.symbols)

    #Main run definition called by server
    def runStockTicker(self, runtime, delay, speedtime): 

        
        self.getSymbols()
    
        self.GetfullStockImage()
        self.keySwapper += 1
        self.running = True
        
    
        while (True):
            if (self.running == True):
                
            
                #th = threading.Thread(target=self.displayMatrix)
                #th.start()
                self.displayMatrix()
                time.sleep((int(runtime) - int(delay)))
                self.getfullStockImage()
             
                #th.join()
                        
               
            else:
                break;

    #Change running to false stopping refresh at next checkpoint
    def stopStockTicker(self):
     
        self.keySwapper = 0
        self.running = False
        print('MATRIX DISPLAY STOP CALLED')
    
       
if __name__ == '__main__':
    
    #print(sys.stdin.readlines())
    stock_ticker = StockTicker()
    stock_ticker.getSymbols()
    #stock_ticker.getFullStockImage()
    #stock_ticker.displayMatrix()
    
    
    while True:
        msg = getInput()
        if msg == 'S':
            stock_ticker.getFullStockImage()
            stock_ticker.displayMatrix()
            
        
        elif msg == 's':
            stock_ticker.delay = 0.04
        elif msg == 'm':
            stock_ticker.delay = 0.02
        elif msg == 'f':
            stock_ticker.delay = 0.01
        elif msg in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']:
            stock_ticker.brightness = min(1.0, float(msg)/10 + 0.1)